A capacitive displacement sensor based resolver for the cryogenic rotary mechanisms of the GMTIFS

David E. Chandler; Robert Sharp; John Hart; Nicholas Herrald; Ian Price; Warrick Schofield; Phillippa Cox

doi:10.1117/12.3018165

19 July 2024 A capacitive displacement sensor based resolver for the cryogenic rotary mechanisms of the GMTIFS

David E. Chandler, Robert Sharp, John Hart, Nicholas Herrald, Ian Price, Warrick Schofield, Phillippa Cox

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130964R (2024) https://doi.org/10.1117/12.3018165
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

GMTIFS a near-infrared Integral-Field Spectrograph instrument is being designed for the Giant Magellan Telescope. This instrument contains precision mechanisms that must operate in a cryogenic vacuum. The positioning control system requires high precession resolvers that can operate under these challenging operating conditions. A prototype mechanism has been manufactured to validate a capacitive displacement sensor-based resolver system. This poster will report on the performance results of the capacitive displacement sensors and the resolver system under representative cryogenic vacuum conditions expected within the final GMTIFS cryostat.

Citation Download Citation

David E. Chandler, Robert Sharp, John Hart, Nicholas Herrald, Ian Price, Warrick Schofield, and Phillippa Cox "A capacitive displacement sensor based resolver for the cryogenic rotary mechanisms of the GMTIFS", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130964R (19 July 2024); https://doi.org/10.1117/12.3018165

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